The complex ion structure of warm dense carbon measured by spectrally resolved x-ray scattering
| Data(s) |
2015
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| Resumo |
<p>We present measurements of the complex ion structure of warm dense carbon close to the melting line at pressures around 100 GPa. High-pressure samples were created by laser-driven shock compression of graphite and probed by intense laser-generated x-ray sources with photon energies of 4.75 keV and 4.95 keV. High-efficiency crystal spectrometers allow for spectrally resolving the scattered radiation. Comparing the ratio of elastically and inelastically scattered radiation, we find evidence for a complex bonded liquid that is predicted by ab-initio quantum simulations showing the influence of chemical bonds under these conditions. Using graphite samples of different initial densities we demonstrate the capability of spectrally resolved x-ray scattering to monitor the carbon solid-liquid transition at relatively constant pressure of 150 GPa. Showing first single-pulse scattering spectra from cold graphite of unprecedented quality recorded at the Linac Coherent Light Source, we demonstrate the outstanding possibilities for future high-precision measurements at 4th Generation Light Sources.</p> |
| Identificador | |
| Idioma(s) |
eng |
| Direitos |
info:eu-repo/semantics/restrictedAccess |
| Fonte |
Kraus , D , Vorberger , J , Helfrich , J , Gericke , D O , Bachmann , B , Bagnoud , V , Barbrel , B , Blazêvić , A , Carroll , D C , Cayzac , W , Döppner , T , Fletcher , L B , Frank , A , Frydrych , S , Gamboa , E J , Gauthier , M , Göde , S , Granados , E , Gregori , G , Hartley , N J , Kettle , B , Lee , H J , Nagler , B , Neumayer , P , Notley , M M , Ortner , A , Otten , A , Ravasio , A , Riley , D , Roth , F , Schaumann , G , Schumacher , D , Schumaker , W , Siegenthaler , K , Spindloe , C , Wagner , F , Wünsch , K , Glenzer , S H , Roth , M & Falcone , R W 2015 , ' The complex ion structure of warm dense carbon measured by spectrally resolved x-ray scattering ' Physics of Plasmas , vol 22 , no. 5 , 056307 . DOI: 10.1063/1.4920943 |
| Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/3100/3104 #Condensed Matter Physics |
| Tipo |
article |
